Safety razor



Aug. 2, 1932. v TEST] 1,869,924

SAFETY RAZOR Filed Jan. 20. 1930 INVEN 4; fiia ATTORNEY Patented Aug. 2,1932.

, UNITED STATES PATENT OFEQE NICHOLASTESTI, OF NEW YORK, Y., ASSIGNOE,BY MESN'E ASSIGNMENTS, T GIL- LETTE SAFETY RAZQB. COMPANY, OF BOSTON,MASSACHUSETTS, A CORPORATION OF DELAWARE SAFETY RAZOR Application filedJanuary 20, 1930. Serial-No. 422,115. g

The present invention relates to that class of safety razors in which aflexible blade is clamped between a guard member and a blade backing.member, positioning studs being provided to retain the blade and thebacking in operative relation to the guard. In this class V of razors,commonly referred to as the Gillette type, the dimensions of the studreceiving apertures in the blade transversely of the latter correspondsubstantially to the diameters of the cylindrical positioning studs, theresult beingthat, when the blade is clamped between the guard and thebacking member, the said blade is apt to crack or break in a lengthsion.

The main object of the present invention is to provide a razor and bladeconstruction, wherein the apertures in the blade are con siderablylarger than the transverse crosssections of the studs, whereby not onlyready assembling of the elements may be had but increased flexibility ofthe blade is obtained for clamping in the blade holder or frame anddanger of the blade cracking or breaking in a lengthwise direction whilebeing bent orun der tension is overcome yet perfect alignment of therazor and blade elements is assured.

Another object of the invention is to so design and arrange the studreceiving apertures in the improved blade that the said apertures areadapted to receive the studs of the'improved razor construction hereindescribed and also studs of backings of the type ofGille-tte safetyrazors on the market. With these and other objects in view, which willmore fully appear as the nature of the invention is better understood,the same con sistsin the combination, arrangement and construction ofparts hereinafter described, pointed out in the appended claims andillustrated in the accompanying drawing, it being understood that manychanges may be Wise direction while being bent or under ten 3 made inthe size and proportion. of the several parts and details ofconstruction within the scope of the appended-claims without departingfrom the spirit or sacrificing any of the advantages of the invention.

Two of the many possible embodiments of the invention are illustrated inthe accompanying drawing, in which Figure 1 is an end View of a razorconstructed in accordance with the present in vention; Fig. 2 is asection taken on line 2-2 of Fig. 1; Fig. 3 is a top plan view of theconstruction shown in Figs. 1 and 2, part of the backing member beingbroken away in order to more clearly disclose the construction; Fig. 4is a section taken on line H of Fig. 3; Fig. 5 is a plan view of theimproved blade used in connection with the construction illustrated inFigs. 1 to 4, inclusive; Fig. 6 is a view similar to the one shown inFig. 3 showing the improved blade mounted on the ordinary Gillettesafety razor; Fig. 7 is a section taken on line 77 of Fig. 6; Fig. 8 isa View similar to the one shownin Fig. 3 of a modification of theinvention; and Fig. 9 is a plan view of the blad'e used in connectionwith the construction shown in Fig. 8.

Referringnow first to Figs. 1 to 5, inclusive, of the drawing, thenumeral 1O indicates a guard member, provided with suitable guard teeth11 in its opposite longitudinal edges and having holes 12 adapted toreceive cylindrical positioning studs 13, which extend from a backingmember 14. The longitudinal axes of these studs are arranged on one sideof the longitudinal axis of the backing member, as clearly appears fromFigs. 1, 3 and 4 of the drawing, and consequently the centers of theholes 12, the diameters of which exceed somewhat the diameters of thetransverse cross-section of the said studs, must be disposed on one sideof the longitudinal aXis of the guard member 10. Between the studs 13 isdisposed on the backing member ascrew-threaded pin 15, adapted to passthrough a hole 16 in the guard member and to engage with athreadedsocket .17 in a handle 18, for the well known purpose. The longitudinalaxis of the pin 15 passes through the longitudinal axes of the backingand guard members (see Fig. 3), as usual in the type of Gillette razorson the market.

The studs 13 are adapted to pass through circular apertures 19 in theblade 20, which is of the thin flexible type having two cutting edges21. The pin 15, on the other hand, is adapted to pass through a centralhole 22 in the blade. The diameter of the last-mentioned holecorresponds substantially to that of the transverse cross-section of thesaid pin. The diameters of the apertures 19, however, exceedconsiderably the diameters of the transverse cross-sections of thepositioning studs 13 and as herein shown approximate one-third the bladewidth. The centers of the two apertures 19 and of the hole 22 in theblade are disposed in alignment, more particularly in the longitudinalcenter line of the blade. Inasmuch as the longitudinal axes of the studs18 are located on one side of the longitudinal axis of the backingmember, it is obvious that the radius of each aperture 19 must exceed inlength that of the radius of the transverse cross-section of apositioning stud by the distance between the longitudinal axis of thestud and the longitudinal center line of the backing memher, in order toobtain contact between the stud and the edge of the aperture throughwhich the stud passes (Fig. 3). From the last-mentioned figure itappears that each stud contacts with the edge of its respective aperturein the blade at a single point only, and that the bounding figure of thetransverse cross-section of a stud and the circular edge of theaperture, throughwhich it passes, are eccentrically located, contactingoutside of the longitudinal axis of the razor frame. One of theadvantages of the improved construction is that, when the blade isclamped in the blade holder, danger of the blade cracking or breaking ina lengthwise direction while being bent or under tension overcome. Thisis mainly due to the fact that each positioning lug contactswith theedge of the respective blade aperture at a single point only, and thatthe said aperture is considerably larger than the transversecross-section of the stud. Due to the last mentioned arrangement, theflexibility of the blade is materially increased.

Referring now to Figs. 6 and 7 of the drawing, the numeral 23 indicatesa guard member of the ordinary Gillette constructon and the numeral 24the blade backing member thereof. In this construction the positioningstuds 25 are disposed in the longitudinal axis of the backing member,and the distance between the longitudinal axis of each stud 25 and thethreaded pin 15 is shorter than the distance of the correspondingelements of the construction shown in Figs. 1 to 4, inclusive, by thedifference between the radii of the blade apertures 19 and thetransverse cross-sections of the position ing studs, the studs shown inFigs. 1 to 4, inclusive, being of the same dimensions as the studs shownin Figs. (5 and 7 of the drawing.

Consequently, when the improved blade 20 is mounted on the razor frameshown in Figs. 6 and 7 of the drawing, the studs 25 contact with theedges of the blade apertures 19 in the longitudinal axis of the saidblade. The construction, therefore, has the advantagcs described inconnection with Figs. 1 to 5, inclusive, of the drawing, and the bladehas the added advantage that it may be used in connection with theimproved razor construction shown in Figs. 1 to i, inclusive, of thedrawing and also in connection with the ordinary Gillette razorillustrated in Figs. 6 and 7 of the drawing.

The modification illustrated in Figs. 8 and 9 of the drawing diiiersfrom those above described only in that the positioning stud receivingapertures 26 in the modified blade 27 are square in shape, the length ofeach side of the square corresponding to the diameter of an aperture 19in the blade construction shown in Fig. 5. Therefore, this blade may beused in connection with the razors shown in Figs. 1 to at, inclusive,and also with the razors shown in Figs. 6 and 7 of the drawing, thelatter arrangement being illustrated in Fig. 8.

It will be noted that the blade apertures described herein are ofregular contour, one being circular and the other square. It is obviousthat instead of the square configuration any other regular polygonaldesign may be used without departing from the invention.

What I claim is:

1. A safety razor including a blade holder, two spaced cylindricalpositioning studs on said holder having their longitudinal axes locatedon one side of the longitudinal axis of said holder, a clamping pin onsaid holder disposed centrally in the longitudinal axis thereof, and ablade having spaced positioning stud-receiving apertures and aclampingpin receiving opening, each of said positioning stud receivingapertures being of regular contour and having its center disposed in thelongitudinal axis of said blade, each aperture being both transverselyand longitudinally of the blade larger than the diameter of therespective positioning stud.

2. A safety razor including a blade holder, two spaced cylindricalpositioning studs on said holder having their longitudinal axes locatedon one side of the longitudinal axis of said holder, a clamping pin onsaid holder disposed centrally in the longitudinal axis thereof, and ablade having spaced circular positioning stud receiving apertures and aclamping pin receiving opening, the centers of said apertures beingdisposed in the longitudinal axis of said blade and each aperture havinga diameter of a size that the respective stud contacts with the edgethereof.

3. A safety razor blade having a clamping pin receiving hole and apositioning stud receiving aperture on each side thereof, said aperturesbeing of regular outline and their centers being disposed in thelongitudinal center line of said blade in alignment with the center ofsaid hole, each aperture being larger than said hole so that its edge isadapted to contact at one point only with a positioning stud passingeccentrically through said aperture with its longitudinal axis locatedeither in the longitudinal center of said blade or outside of the same.

4. In a safety razor blade according to claim 3, said hole and saidapertures being each of circular configuration, and said apertureshaving a diameter not less than onethird of the blade width.

Signed at New York city, in the county of New York and State of NewYork, this 8th day of January, A. D. 1930.

NICHOLAS TESTI.

